Difference between revisions of "EEPROM"
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EEPROM_WriteNBytes(100,A_RamBuffer_U8,5); //Copies 5bytes of data from A_RamBuffer_U8 into eeprom location 100. | EEPROM_WriteNBytes(100,A_RamBuffer_U8,5); //Copies 5bytes of data from A_RamBuffer_U8 into eeprom location 100. | ||
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==EEPROM_WriteString== | ==EEPROM_WriteString== | ||
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EEPROM_WriteString(50,A_StringBuffer_U8); //Copies "Hello, World" along with NULL character into eeprom location 50. | EEPROM_WriteString(50,A_StringBuffer_U8); //Copies "Hello, World" along with NULL character into eeprom location 50. | ||
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==EEPROM_Erase== | ==EEPROM_Erase== | ||
Revision as of 17:35, 27 December 2014
Contents
EEPROM
EEPROM_WriteByte
| Defination | void EEPROM_WriteByte(uint16_t v_eepromAddress_u16, uint8_t v_eepromData_u8) |
| Input Arguments | uint16_t: eeprom_address at which eeprom_data is to be written. uint8_t: byte of data to be to be written in eeprom. |
| Return Value | none |
| Description | This function is used to write the data at specified EEPROM_address.. |
| Usage | EEPROM_WriteByte(1234,25); //Writes 25 at the eeprom address 1234. |
EEPROM_WriteNBytes
| Defination | void EEPROM_WriteNBytes(uint16_t v_eepromAddress_u16, uint8_t *p_ramAddress_u8, uint16_t v_numOfBytes_u16) |
| Input Arguments | uint16_t,: eeprom_address from where the N-bytes are to be written. uint8_t*: Buffer(Pointer) containing the N-Bytes of data to be written in Eeprom.. |
| Return Value | none |
| Description | This function is used to write N-bytes of data at specified EEPROM_address. |
| Usage | uint8_t A_RamBuffer_U8[5]={10,20,30,40,50}; // Buffer containing the data to be written in Eeprom EEPROM_WriteNBytes(100,A_RamBuffer_U8,5); //Copies 5bytes of data from A_RamBuffer_U8 into eeprom location 100. |
EEPROM_WriteString
| Defination | void EEPROM_WriteString(uint16_t v_eepromAddress_u16, char *p_stringPointer_u8) |
| Input Arguments | uint16_t: eeprom_address where the String is to be written. char*: String(Pointer to String) which has to be written in Eeprom. |
| Return Value | none |
| Description | This function is used to Write a String at specified EEPROM_address.NOTE: Null char is also written into the eeprom. |
| Usage | uint8_t A_StringBuffer_U8[20]="Hello, World"; // String to be written in eeprom EEPROM_WriteString(50,A_StringBuffer_U8); //Copies "Hello, World" along with NULL character into eeprom location 50. |
EEPROM_Erase
| Defination | void EEPROM_Erase() |
| Input Arguments | none |
| Return Value | none |
| Description | This function is used to erase the entire Eeprom memory. Complete Eeprom(C_MaxEepromSize_U16) is filled with 0xFF to accomplish the Eeprom Erase. |
| Usage | EEPROM_Erase(); //Erases the complete(C_MaxEepromSize_U16 bytes) eeprom. |
EEPROM_ReadByte
| Defination | uint8_t EEPROM_ReadByte(uint16_t v_eepromAddress_u16) |
| Input Arguments | uint16_t: eeprom_address from where eeprom_data is to be read. |
| Return Value | uint8_t: data read from Eeprom. |
| Description | This function is used to read a byte of data from specified EEPROM_address. |
| Usage | eeprom_data = EEPROM_ReadByte(100); reads the data from eeprom location 100 which is copied to eeprom_data |
EEPROM_ReadNBytes
| Defination | void EEPROM_ReadNBytes(uint16_t v_eepromAddress_16, uint8_t *p_ramAddress_u8, uint16_t v_numOfBytes_u16) |
| Input Arguments | uint16_t,: eeprom_address from where the N-bytes is to be read. uint8_t*: Pointer into which the N-bytes of data is to be read. |
| Return Value | none |
| Description | This function is used to Read N-bytes of data from specified EEPROM_address. The data read from the eeprom will be copied into the specified RamAddress . Note:Care should be taken to allocate enough buffer to read the data. |
| Usage | uint8_t A_RamBuffer_U8[20]; // Buffer to read the Eeprom data EEPROM_ReadNBytes(1000,A_RamBuffer_U8,20); //Copies 20bytes of eeprom data(address 1000) into A_RamBuffer_U8 |
EEPROM_ReadString
| Defination | void EEPROM_ReadString(uint16_t v_eepromAddress_u16, char *p_destStringAddress_u8) |
| Input Arguments | uint16_t: eeprom_address from where the String is to be read. char*: Pointer into which the String is to be read. |
| Return Value | none |
| Description | This function is used to Read a String from specified EEPROM_address.The string read from eeprom will be copied to specified buffer along with NULL character. |
| Usage | uint8_t A_StringBuffer_U8[20]; // Buffer to read the Eeprom data EEPROM_ReadString(200,A_StringBuffer_U8); //Copies a string from eeprom(address 200) along with NULL caharacter into A_StringBuffer_U8 |
user guide
/* Program to illustrate the eeprom Read/Write */ #include"uart.h" #include"delay.h" #include"eeprom.h" int main() { uint8_t a_writeBuffer_u8[5]={10,20,35,50,60}; char a_readString_u8[20]; uint32_t v_writeNumber_u32=123456789; uint32_t v_readNumber_u32=0x00; char v_readChar_u8; uint8_t a_readBuffer_u8[5]; uint8_t i; UART_Init(9600); //Initialize UART at 9600 baud UART_TxString("\n\rErasing the Eeprom"); EEPROM_Erase(); UART_TxString("\n\rWriting below data into eeprom"); UART_TxString("\n\rchar= A"); UART_TxString("\n\r5-Bytes= 10,20,35,50,60"); UART_TxString("\n\rString: hello, world"); UART_Printf("\n\r32-bit number= %L",v_writeNumber_u32); EEPROM_WriteByte(10,'A'); EEPROM_WriteNBytes(100,a_writeBuffer_u8,5); EEPROM_WriteString(150,"hello, world"); EEPROM_WriteNBytes(200,&v_writeNumber_u32,sizeof(v_writeNumber_u32)); UART_TxString("\n\r\n\rReading Data back from eeprom"); v_readChar_u8 = EEPROM_ReadByte(10); EEPROM_ReadNBytes(100,a_readBuffer_u8,5); EEPROM_ReadString(150,a_readString_u8); EEPROM_ReadNBytes(200,&v_readNumber_u32,sizeof(v_readNumber_u32)); UART_Printf("\n\rchar:%c",v_readChar_u8); UART_TxString("\n\r5-Bytes: "); for(i=0;i<5;i++) UART_Printf("%d ",a_readBuffer_u8[i]); UART_Printf("\n\rstring:%s",a_readString_u8); UART_Printf("\n\r32bit Number:%L",v_readNumber_u32); while(1); return 0; }